FAQs on Coelenterates (Nideria) - Diversity

Question 1

1. What are coelenterates?

Accepted Answer

Ans. Coelenterates, also known as Cnidarians, are a diverse group of invertebrate animals that include jellyfish, sea anemones, corals, and hydroids. They are characterized by their radial symmetry, presence of specialized stinging cells called cnidocytes, and a simple body plan with a central digestive cavity.

Question 2

2. How diverse are coelenterates?

Accepted Answer

Ans. Coelenterates exhibit a wide range of diversity in terms of their size, shape, and habitat. They can be found in marine and freshwater environments across the globe. From tiny hydrozoans to large jellyfish and intricate coral reefs, coelenterates showcase remarkable diversity in their morphology and ecological adaptations.

Question 3

3. What is the significance of coelenterates in ecosystems?

Accepted Answer

Ans. Coelenterates play a vital role in marine ecosystems. Corals, for example, form extensive reef systems that provide habitats for numerous marine organisms. Additionally, coelenterates are important predators and prey, contributing to the overall balance of the food chain. Their symbiotic relationships with other organisms, such as the mutualistic association between corals and photosynthetic algae, also have ecological significance.

Question 4

4. How do coelenterates capture their prey?

Accepted Answer

Ans. Coelenterates possess specialized stinging cells called cnidocytes, which enable them to capture and immobilize their prey. When triggered by touch or chemical cues, the cnidocytes discharge a harpoon-like structure called a nematocyst, injecting venom into the prey. This venom paralyzes or kills the prey, allowing the coelenterate to consume it.

Question 5

5. How do coelenterates reproduce?

Accepted Answer

Ans. Coelenterates exhibit both sexual and asexual reproduction. Most coelenterates have a life cycle that includes a polyp stage, where a stationary form develops and produces offspring asexually through budding. Some species also have a medusa stage, which is a free-swimming form that reproduces sexually by releasing eggs and sperm into the water for fertilization.

Coelenterates (Nideria) - Diversity Video Lecture - Class 11

Top Courses

Best Courses

Recommended Courses

CBSE Classes

Competitive Exams

Study Coelenterates (Nideria) - Diversity on the App